Wireless communication apparatus, communication method, computer program, and wireless communication system

A wireless communication method comprising:

• generating a frame including a plurality of subframes;
• transmitting the generated frame to another communication apparatus;
• and
• notifying of is regarding a plurality at lengths of a short transmission time interval which a transmission time in shorter than one subframe period in the subframe.

A computer program causing a computer to execute:

• generating a frame including a plurality of subframes;
• transmitting the generated frame to another communication apparatus;
• and
• notifying of information regarding a plurality of lengths of a short transmission time interval which is a transmission time interval shorter than one subframe period in the subframe.

A wireless communication system comprising:

• a first communication apparatus;
• and
• a second communication apparatus,
• wherein the first communication apparatus includes
• a frame generation unit configured to generate a frame including a plurality of subframes,
• a transmission unit configured to transmit the generated frame to the second communication apparatus, and
• a notification unit configured to notify the second communication apparatus of information regarding a plurality of lengths of a short transmission time interval which is a transmission time interval shorter than one subframe period in the subframe, and
• the second communication apparatus includes
• an acquisition unit configured to receive the frame and acquire information regarding the plurality of lengths of the short transmission time interval in the subframe from the first communication apparatus.